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Micromagnetic Studies of High Frequency Permeability in Fe-Al-N Thin Film Head
Xuan ZHANG Dan WEI
IEICE TRANSACTIONS on Electronics
Publication Date: 2002/10/01
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Recent Progress in Information Storage Technology)
Fe-Al-N thin film, permeability, frequency response, micromagnetic simulation,
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A simplified model is set up to study the high frequency response in a thin film head, where two pieces of Fe-Al-N films are placed parallel to each other with opposite alternating external magnetic field applied. In this model, the frequency response of magnetic clusters is calculated by a micromagnetic model based on the Landau-Lifshitz-Gilbert equations, and the initial permeability of mesoscopic Fe-Al-N thin films is analyzed in a wide frequency region from 10 to 5000 MHz. The model of a soft magnetic thin film is built up on the ripple structure of the anisotropy field of magnetic clusters. The magnetization interaction between the two Fe-Al-N films is carefully computed to find its effect on the frequency response. The frequency response in a single mesoscopic Fe-Al-N thin film is carefully studied in advance.